FPDF error: Can't open image file: https://maps.google.com/maps/api/staticmap?zoom=14&size=605x360&maptype=roadmap&markers=size:mid%7Ccolor:red%7C47.6336806,12.213764200000014&sensor=false&key=AIzaSyA2kvZlEq5jLaLczCziVfCMpL_jj8qXISg